Evidence for spin memory in the electron phase coherence in graphene

Kozikov, A A and Horsell, D W and McCann, Edward and Falko, Vladimir (2012) Evidence for spin memory in the electron phase coherence in graphene. Physical review B, 86 (4). ISSN 1550-235X

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We measure the dependence of the conductivity of graphene as a function of magnetic field, temperature, and carrier density and discover a saturation of the dephasing length at low temperatures that we ascribe to spin memory effects. Values of the spin coherence length up to eight microns are found to scale with the mean free path. We consider different origins of this effect and suggest that it is controlled by resonant states that act as magneticlike defects. By varying the level of disorder, we demonstrate that the spin coherence length can be tuned over an order of magnitude.

Item Type:
Journal Article
Journal or Publication Title:
Physical review B
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©2012 American Physical Society
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Deposited On:
28 Aug 2012 12:54
Last Modified:
28 May 2023 01:58